Don't fancy jaws much

The research is the first to suggest that a more masculine facial appearance in women might convey their sexual unrestrictedness and perhaps their long-term mate quality

Dr Lorne Campbell

Researchers reckon a prominent jawline can be a tell-tale sign that a woman will be unfaithful.

And they’re warning Brit men that girls with larger chins, like Kelly Osbourne and Camilla Duchesss of Cornwall, often need a lot more sex than other girls.

A team of American psychologists studied a group of women and probed their love lives.

They found while guys often find masculine-jawed women a turn-off they are often far more sexually active than girls with more feminine features.

They reckon it is all to do with the level of male hormone testosterone in their bodies that boosts their “sexual assertiveness”.

The researchers found men sub-consciously shy away from big-chinned lovelies because of an evolutionary urge to mate with someone who’s faithful.

And while the likes of Camilla, 61, who had a long-term affair with Prince Charles before their eventual marriage, are considered more likely to cheat, women with soft jaws such as Victoria Beckham, 34, are more likely to stick to one man.

Dr Lorne Campbell, one of the research team, said: “It is difficult to conceal physical features, such as facial characteristics, that are partly governed by testosterone and reliably correlate with one’s sexual history and attitudes.

“The research is the first to suggest that a more masculine facial appearance in women might convey their sexual unrestrictedness and perhaps their long-term mate quality.”

The findings were published in the respected journal Personality And Individual Differences.